I saw this movie recently and it was, in fact, the one who made me do this post in the beggining.
So, here we have this apparently powerful couple, he is a doctor, she is a stay home mother and basically everything turns around marriage, commitment, fidelity, dreams, reality, etc. And what you see in these last minutes of the movie is them talking about their shit, being realistic about the impossibility of swearing the 'forever' part on a marriage. And, in order to reconciliate, she makes this sugestion that really made me laugh because is so unexpected and yet, realistic! and if you've watched the movie, you will understand why this scene is particulary funny.